Grinder for frozen and fresh meat

Abstract

A grinder, which is designed to cut frozen or fresh or fresh meat, has a set of blades, comprising a carving blade ( 2 ) and a perforated disc ( 4 ), in-between which a blade ( 3 ) is arranged in a defined fixed intermediate space. The blade ( 3 ) is spring-loaded and is pressed against the perforated disc with a preset force, so that wear can remain constant throughout the service life of the blade, and the service life of the blade can be enhanced.

We claim:  
     
       1. A grinder, particularly for the grinding of frozen and fresh meat, comprising a worm conveyor ( 1 ), a drive shaft ( 10 ), and a set of blades which comprising a carving blade ( 2 ) arranged after the worm conveyor ( 1 ), a perforated disc ( 4 ) arranged after the carving blade ( 2 ) at a fixed distance, a driven blade ( 3 ) arranged between the carving blade ( 2 ) and the perforated disc ( 4 ), and a spring ( 8 ) disposed between the worm conveyor ( 1 ) and the driven blade ( 3 ) to bias the driven blade ( 3 ) toward the perforated disc ( 4 ), the set of blades being clamped by a cap nut ( 7 ) in a worm housing ( 9 ), wherein the distance from the carving blade ( 2 ) to the perforated disc ( 4 ) is equal to or slightly greater than an axial extension of the driven blade ( 3 ), and wherein the driven blade ( 3 ) is arranged on the drive shaft ( 10 ) in an axially displaceable fashion and pressed against the perforated disc ( 4 ) with a predetermined initial spring loading provided by the spring ( 8 ). 
     
     
       2. The grinder according to  claim 1 , wherein the carving blade ( 2 ) has a greater inner diameter than a diameter of the drive shaft ( 10 ), and wherein a pressure element ( 15 ) acting upon the blade ( 3 ) by force of the spring ( 8 ) is arranged in an intermediate space between the drive shaft ( 10 ) and the carving blade ( 2 ). 
     
     
       3. The grinder according to  claim 1 , wherein the carving blade ( 2 ) comprises two parts pressed against each other. 
     
     
       4. The grinder according to  claim 1 , wherein the perforated disc ( 4 ) is followed by at least one other perforated disc ( 4 ) at a fixed distance, between which a spring-loaded driven blade ( 3 ) is arranged. 
     
     
       5. The grinder according-to  claim 2 , wherein the pressure element ( 15 ) is a spring-loaded bushing. 
     
     
       6. The grinder according to  claim 5 , wherein the spring ( 8 ) is a disc or helical spring. 
     
     
       7. The grinder according to  claim 6 , wherein the pressure element ( 15 ) includes the helical spring ( 8 ).